Horseshoe and calk



W. T. SHEPERDSON uonsssnos AND CALK Filed Oct. 28, 1926 Aug. 28, 1928.

Withpalks m 1s;

Patented Aug. 28, 1928.

"UNITED, STATES rarest Omar.

WILLIAM :1'..SHEPERDSON,.OF rAxroN, .MASSACHUSETTS; JOHN WILLIAM SHEPERD- SON EXEcUroa or SAID WILLIAM :r. sHEP eRnsoN, DECEASED.

EoRlsEsHor: AND. Cami Application met-ware ,28, 19 26 Ser1a1 1%. 144,840.

v The principalob jects of this inventioniare to provide, an improved [form of calk in which the wearing of the calk will not really reduce its sl1arpn e'ss, and. at the f same time avoid the presence of, pockets which ca 111 be filled .iiplw'ith dirt 5 thelike' j. and perhaps be' frozen position; also. to, provide replaceable calks' so constructed that they will not turn or fallout, due to the special shape of the shankj 'andf to provide other imprm'ementsin afreplaceable drive calk and rolledhorseshoefto which they are Reference is tobe had to. the accompanyingdrawin gsiriwhich,

Fig-1 is a bottom plan view of a horseshoe c0nstri icted in accord; ance with this invention; c Fig. 2 is an edge =viewfo'f the same,

Fig.3isatopplam;

Fig. t is an e'nlargedsectional view onthe line 44 of Fig.1;

Elg.;.5 is -.,aside view;of one. ofr'the heel calk's;

Fig. 6 is a central transverse sectional View of the same showing the shank however in elevation;

Fig. 7 is an elevation of the toe calk, and Fig. 8 is a bottom plan view of one of the calks.

Referring first to the shoe in which there are some features of importance, it may be stated that this shoe 10 is produced by rolling instead of drop forging, and is thinned along an area 11 on the under side for lightness, and also slanted off on the top throughout an area 12 on the inner side partly for lightness. This shoe is provided, of course, with the usual nail-holes l3 and with two perforations 14 for the heel calks, these perforations being circular with opposite flat sides. A similar perforation 15 is provided for the toe calk. This shoe is creased at 16. To lighten the shoe it is rolled thinner between the toe and heels at 11 as specified, and has a special groove 12 as shown. In the inner side of the shoe there is a. groove 17 extending around the interior and of special form for the purpose of lightening the shoe. This reduces the width of the shoe on the bottom but not on the top as the groove is located at the bottom.

It will be understood that the calks are made replaceable and that diflerent calks may be used for summer and winter wear.

The calk is for; winter-useas that will disclose theinvention sufficiently.

The toe calls 18 and the heel calks19 have similar, characteristics, but, of; course, the toe calk is of areuate form while the heel ealks .may be straight, In I both cases .each calk is provided with a ,central shank 20 which is ofa generalcircular-shape but having'fiattened sides. 21 opposite each other to fit in the perforations l t and .15.- The. fiat sides have a greater taper than the two .half roundsurf aces of the shanki The flat surfaces of ,the. ,shank; drive; ;into.;the tapered hole l .or, 15 of the shoe like awedge-and the round part withthe smaller taperhelps to tighten theealk. ture as the call; is ;'held inplace :firmly after ncebeillgflppliedg and on account of'the flat sidesit willinot twist. Theshanks of the summer calksare alsomade inthe ame way, and the summer calks. are replaceable like the. ,winter 5 callgs f .The'se calksi are; also reversible in case the outside of the calk should wear down faster than the inside, or a calk could be placed on the other foot.

The calk itself, in each instance, is formed with a plain web 23 throughout the center, curved in the case of the toe calk, to correspond with the shape of the calk as a whole. This Web is of substantially uniform thickness from the base of the calk to the tip, so that as it wears down it will retain the same thickness all the time and will not get thicker and thicker and have a blunt operating edge as it grows shorter. Such a shape by itself would be impractical because it would be easily broken or bent.

For the purpose of strengthening it, I provide each calk at its two ends with a transverse strengthening flange 24. These strengthening flanges are triangular in shape extending from the base to the tip of the web 23 and of a thickness as great as the thickness of the web, or greater, so that they constitute struts to hold the tip of the web in it original position at all times and protect the web 23 from getting bent or broken. The surfaces 25 b i which the edges of the flanges 24 are connected with the web 23 are all slanting in both directions so as to avoid any parallel surfaces that would hold dirt and mud. On the other hand these surfaces are of such shape as to permit anything that once collects in them to .flhisi's animportant feadrop away, with the help of the jarring to which the horseshoe put when in use. Therefore these cavities do not fill up in practice, and the mud which they tenrporarily collect will not have time to freeze therein.

In the case of the toe calk, I provide it with a shoulder 26 about a 16th of an inch deep and located at each end to furnish space enough at the 'endsof thebla-de to receive an extractor and permit of its being removed under all conditions. i

It willbe seen that this invention involves anew shape of blade on a drive calk with strengthening walls at its ends, also a new shape of shank with flat sides and halfround sides. The flatsides have a greater taper and the half-round sides a' s'mailer taper'thus helping to hold the callc' in tight, and the shoe having holes punched in itto coi'respond'to the specific shape of the shank mentioned. I

Although I have illustrated and described onlyasingle' form'of the invention I am aware of the fact'that changes can'be made therein by any person skilled in"the art without departing from the-scope of the invention as expressed in the claims. Therefore I do not wish to be limited tothe exact form shown, but what I do claim is 1. As an article of manufacture, a replaceable horseshoe calk having a centrallongitudina'l plain web of substantially uniform are thie'ke'r than their edges,

thickness, and having transverse triangular end walls connecting. the ends pf the web to the base for strengthening the web, 'the surfaces connecting the interior surfaces of the web and end walls all. diverging from each other from the centeroutwardly, whereby the centers of the end walls at their bases and said calk having positive means for preventing it from turning.

2. As an article of manufacture, a replacea f"h Q k'hlev ilt": e tr 1 tudirial web of uniform thickness and ilfia'ving end walls conn'ecting'the end of the web to the basefor strengthening call: 'l1aving a shanli -with sides I and two opposite, arcuate sides, the fiat sid'es" having a larger taper than the arciiate sides. 3. The. combination with-a horseshoe having the Web, sai d two 'opposite flat a perforation. with two opposite fiat sides having a comp'aiatively'large taper and two opposite "rounded having a smaller taper, of a calk having a shank with opposite flattened ,sides and oppositetrounded sides, ha'ving tapers like the perforations, whereby the fiat sides of thejshank can be driven into the perforation'and they will hold itlike a wedge, and the rounded's'ides with a. smaller taper will tighten the calk.

In testimony whereof :I have hereunto affixed my signature.

WILLIAM 'r. SHEPERDSON. 

